I need a logic to build a table booking app that makes user to book his table .....  and we have to make sure that table is free at user requested time.   Please suggest how many way we can solve this 

I am using a VF page to only show a particular List View instead of the standard Leads tab.  Everything works fine, but if a user deletes a lead, the delete button brings the user back to the standard lead tab.  I need to create a custom delete button so that I can redirect them to my VF page.  Can someone give me the code (or tell me where to find it) for the standard delete button?  OR how to create a custom delete button so I can redirect them to my VF page?

I need a logic to build a table booking app that makes user to book his table .....  and we have to make sure that table is free at user requested time.   Please suggest how many way we can solve this